Energy transition can transform technology and governance aiming to addressenergy security and climate change mitigation at various levels. This study analysesenergy self-sufficient village efforts, by using the framework of energy regime transition:renewable energy based technology; participatory governance; and active energyproducer norm. In particular, we highlight the role of intermediary supportingorganization in realizing energy transition through facilitating public-private partnership,and education. To achieve energy regime change, the roles of intermediarysupporting organizations are critical to form networks and to change perceptionsof stakeholders. By comparing Yondae Island of Tongyong city and Mara Islandof Jeju province, this study empirically contributes to our understandings of energyregime transition and its drivers. This study also suggests that strengthening intermediarysupporting organization is a way to advance village-level energy regimetransition.